Improvement in lathes



C. W. WILDER.

No.l50,73.7.

- Patented May1"2,1874.

UNITED STATES,V

PANT- OEFI cHAELEs w. wrLnEE, or rrronEUEe, MAsskcHUsErrs.

I IMPROVEMENTIN LATHES.

Specification forming part of Letters Patent No. i50,737, dated May 12,1874 application filed October 15,1873. f

To all whom t may concern:

Be it known that I, CHARLES W.W1LDEE, of the city of Fitchburg, in thecounty of Worcester and Commonwealth of Massachusetts, have inventedcertain new and useful Improvements in Lathes, as patented to A. D.Waymoth, July 29, 1856, and August 11, 1857, and used for turningspools, bobbins, 812e. and I do hereby declare the following to beafull, clear, and exact description of the same, reference being had tothe accompanying drawings, which form a part of this specification, andin which- Figure 1 represents a side view of the improved lathe withcertain parts broken away, as will be hereafter more fully described.Fig. 2 represents a top or plan view ofthe same 5 and Fig. 3 representsa vertical section on the line a', Fig. 2. j

To enable those skilled in the art to which my invention belongs to makeand use the same, I will now proceed to describe it in detail.

1n the drawings, Figs. 1 and 2, A` represents the: head-stock, B thecenter-piece, and .C the tail-stock. Y The said improvements relate,'lirst, to a cam device for operating the knives, instead of by the oldknee-lever; second, to a mechanism or clutch device for automaticallymoving both center-piece and tail-stock on their metal ways during theoperation of themachine, third, to a double-slottedfeed-rod, as will behereafter described.

Secured to the center-piece or tool-carriage B by screws b is' a metalplate, D, resting on extended parts c of the carriage-frame, andattached to this plate c, projecting downward from its under surface, isa similar and longer metal plate, E, which furnishes bearings for thegear Fl and the upper gear Gr, meshing int-oit. 4

A peeuliarity of this latter gear G is that its journal is a cylinder,through which passes the double-slotted feed-rod H, and being socombined as to turn with said rod.

On 'the disk of 'gear F is a cam, chef the shape as shown in Fig.`3. Tothe arm e of lever I is attached a metal piece, f, its upper edge bentto an angle, so that the cam el may come in contact with the undersurface thereof as it revolves, and thereby automatically raise in itsslot. On the other end of the short rod t', and hinged to it, is asimilar draw-bar or flat metal strip, k, attached by a hinged joint to apin, Z, in the disk of a crank-wheel,

K, which turns on a screw or pin, 5, fast in a downward-projecting partof the center-piece. At a point nearly opposite pin Z, in the disk ofwheel K, is journaled to a stud one end of a short link or bar, m,theother end of said link or bar being hinged to the lower end oftool-holding piece L by a projecting stud, n; The Mtool-holding piece Lis pivoted at 7 between two upright parts of the center-piece.

From the foregoing description, it will be seen that with everyrevolution of the large gear F the upper end of the tool-holding piecewill be moved forward with its shaping-knife, (the knife heilig attachedto the upper end of piece L in any suitable manner,) to shape or turn inproper form the article tov be produced. As soon as the forming-knifehas been thrown sufeiently far forward to shape the article, stud 6 isthrown past the center, and causes the upper end of the tool-piece, towhich is attached the shaping-knife, to move backward, and thus withdrawthe shaping-knife, while the cutting-off knife is forced up stillfarther to complete its work of cutting off the article being turned. Assoon as the article is cut od, cam d passes from under the plate j',when spring o (shown in Fig. 3) forces lever I, and the parts connectedtherewith, back into the position shown in Fig. 3.

From the base part of the frame of the tailstock C, and attached to it,projecting downward,.is a flat metal piece, M, supporting and furnishingbearings for a bevel-gear, N, meshing into bevel-gear O, which slides onfeed-rod I-I; the journal of said gear O, which is its hub turning inthe piece p, projecting from and attached to piece M. Feed-rod H isprovided with two slots upon opposite sides, and into which two splinesproject from the hub or journal of gear O. These splines thus arrangedto work in slots upon opposite sides of feed-rod H 'prevent all crampingor bind- 2 Mcgraw ing of gear O as it is moved back and forth during theoperation of the machine.

By means of gear N and hinged bar q, combined with it as shown, thesliding clutch device is operated as follows: First, said device isconstructed of a shell, It, having a bar, i', pivotcd between its sides.This bar being ljointed at its other end to bar g, a spring, s, hearsagainst a metal piece, t, bent to the form of an angle, which piece isalso pivoted to the shell, and having the end of its arm 3 bent acrossthe surface of bar r, and the edge of said bent portion fitting into anotch in said bar fr. The corner 4 of this latter bar is rounded off,while the opposite corner is left square and sharp, so that when thesaid bar r is in the position shown in Fig. l, it is just beginning toclutch the bar S, on which the clutch device slides, and as-the clutchdevice is thus clamped to bar S, while the slotted feed-rod continues torevolve, the tail-stock is drawn toward the head-stock the desireddistance during each revolution of the bevel-gear N. The center-piece isalso moved along the desired distance, to form the next article orobject to be turned, during each revolution of said gear, in consequenceof the head of the adjusting screw or bolt a striking against the rearpart of the center-piece, as indicated in Figs. l and 2, and forcing thecente'rpiece along the proper distance.

The operation is as follows: A stick having been chucked or placed inposition between the headstock and center-piece, the feed-rod H is putin motion, which brings the shapin g-knife in the tool-holder first intoplay; then said knife moves back by the operation of the cam device, asheretofore explained, and simultaneously with this latter movement thecutting-off knife slides up, performs its office, and falls back. Whilethe shaping-knife has been performing its work, the clutch de vice hasbeen sliding along on its bar the proper distance, and, coming incontact with the stop V, attached to center-piece B, its for- 'wardmotion is arrested, and consequently as gear N continues to revolve, it,together with the tail-stock, is thrown back sufficiently to release orwithdraw a boring-bit (when one is used in the end of the tail-spindle)from the article being turned or formed in the lathe, before the-articleis entirely severed from the stick by the cutting-off knife. As soon asthe article is cnt off and drops from the lathe, the tail-stock is drawnforward, thereby throwing the center-piece forward a sufficient distanceto form another article, when the operation of shaping and cutting` offis repeated until the stick is used up.

For the purpose of arresting the forward movement of the tail-stockafter the turning has been continued as near the head-stock as it can bedone with safety, the sliding bar S is provided with a stop, S, againstwhich the forward end of the clutch device strikes, thereby stopping theforward movement of the tail-stock, and consequently the center stock,although the feed-rod H may be continued in motion. After one stick ofmaterial has been turned or used up, the feed-rod is stopped, and thetail-stock and center-piece are slid or pushed back by hand, after whicha new stick is chucked, and the operation is repeated.

rlhe feed-rod H is driven by a belt, and for that purpose a tight andloose pulley or a clutch device may be combined with it, so that saidfeed-rod may be stopped, at the will of the operator, 'by some suitableshipping or unclutching device. p

The tailstock may be operated by means of lever W, and the center-piecemechanism by knee-lever I, as in. the VVaymoth lathe referred to, if atany time it would be desirable to do so.

Different holes are to be made in gear N, so that the crank-pin can bechanged to give the clutch device a greater or less throw for turningdifferent lengths of article.

Having described my improvements in turningwlathes, what I claim thereinas new and of my invention, and desire to secure by Letters Patent, is

1. The combination, with the center-piece B and tail-stock C of thelathe, of the mechanism, as herein described, for automatically movin gthem forward, and operatie g the shapingv and cutting-off knives,substantially as and for the purposes set forth.

2. The combination, with the slide-rod S and feed-rod H., of gears O andN and clutch device, substantially as and for the purposes set forth.

3. The combination, with shell It and bent piece t, of the bar 1' andspring s, substantially as and for the purposes set forth.

et. The combination, with center-piece B and clutch device, of the stopdevice V, suhstantially as and for the purposes set forth.

5. The combination, with slide-bar S and clutch device, of stop S,substantially as and for the purposes set forth.

6. rlhe combination, with gear F and lever I, of cam d and bent metalpiece f, substantiall y as and for the purposes set forth;

7 The combination, with the tool-holder L and cutting-off knife, of arme, bars L and my, and crank-wheel K, substantially as and for thepurposes set forth.

8. The combination, with arm c, of spring o and cam d, substantially asand for the purposes set forth.

CHARLES W. VILDER.

Witnesses:

JEROME A. KrNsMAN, E. E. Moonn.

